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[flash-ing] /ˈflæʃ ɪŋ/

noun
1.
Building Trades. pieces of sheet metal or the like used to cover and protect certain joints and angles, as where a roof comes in contact with a wall or chimney, especially against leakage.
2.
the act of creating an artificial flood in a conduit or stream, as in a sewer for cleansing it.
3.
Photography, Movies. the process of increasing film speed by exposing undeveloped film briefly to a weak light source before using it or of exposing photographic printing paper to reduce contrast.
[flash] /flæʃ/
noun
1.
a brief, sudden burst of bright light:
a flash of lightning.
2.
a sudden, brief outburst or display of joy, wit, etc.
3.
a very brief moment; instant:
I’ll be back in a flash.
4.
Informal. (def 1).
5.
superficial, meretricious, or vulgar showiness; ostentatious display.
6.
Also called news flash. Journalism. a brief dispatch sent by a wire service, usually transmitting preliminary news of an important story or development.
Compare (def 2).
7.
Photography.

8.
the sudden flame or intense heat produced by a bomb or other explosive device.
9.
a sudden thought, insight, inspiration, or vision.
10.
Slang. 1 (def 26).
11.
Metallurgy.

12.
Poker. a hand containing all five suits in a game played with a five-suit pack.
13.
a device, as a lock or sluice, for confining and releasing water to send a boat down a shallow stream.
14.
the rush of water thus produced.
15.
.
16.
Obsolete. the cant or jargon of thieves, vagabonds, etc.
verb (used without object)
17.
to break forth into sudden flame or light, especially transiently or intermittently:
a buoy flashing in the distance.
18.
to gleam.
19.
to burst suddenly into view or perception:
The answer flashed into his mind.
20.
to move like a flash.
21.
to speak or behave with sudden anger, outrage, or the like (often followed by out):
to flash out at a stupid remark.
22.
to break into sudden action.
23.
Slang. to open one’s clothes and expose the genitals suddenly, and usually briefly, in public.
24.
Slang. to experience the intense effects of a narcotic or stimulant drug.
25.
to dash or splash, as the sea or waves.
26.
Archaic. to make a flash or sudden display.
verb (used with object)
27.
to emit or send forth (fire or light) in sudden flashes.
28.
to cause to flash, as powder by ignition or a sword by waving.
29.
to send forth like a flash.
30.
to communicate instantaneously, as by radio or telegraph.
31.
to make an ostentatious display of:
He’s forever flashing a large roll of bills.
32.
to display suddenly and briefly:
She flashed her ID card at the guard.
33.
to change (water) instantly into steam by pouring or directing onto a hot surface.
34.
to increase the flow of water in (a river, channel, etc.).
35.
Glassmaking and Ceramics.

36.
Building Trades. to protect from leakage with flashing.
37.
Cards. to expose (a card) in the process of dealing.
38.
Archaic. to dash or splash (water).
adjective
39.
sudden and brief:
a flash storm.
40.
showy or ostentatious.
41.
caused by or used as protection against flash:
flash injuries; flash clothing.
42.
counterfeit or sham.
43.
belonging to or connected with thieves, vagabonds, etc., or their cant or jargon.
44.
of or relating to followers of boxing, racing, etc.
Idioms
45.
flash in the pan,

46.
flash on, Slang.

/ˈflæʃɪŋ/
noun
1.
a weatherproof material, esp thin sheet metal, used to cover the valleys between the slopes of a roof, the junction between a chimney and a roof, etc
/flæʃ/
noun
1.
a sudden short blaze of intense light or flame: a flash of sunlight
2.
a sudden occurrence or display, esp one suggestive of brilliance: a flash of understanding
3.
a very brief space of time: over in a flash
4.
an ostentatious display: a flash of her diamonds
5.
Also called newsflash. a short news announcement concerning a new event
6.
(mainly Brit) Also called patch. an insignia or emblem worn on a uniform, vehicle, etc, to identify its military formation
7.
a patch of bright colour on a dark background, such as light marking on an animal
8.
a volatile mixture of inorganic salts used to produce a glaze on bricks or tiles
9.

10.
(photog, informal) short for flashlight (sense 2), flash photography
11.
a ridge of thin metal or plastic formed on a moulded object by the extrusion of excess material between dies
12.
(Yorkshire & Lancashire, dialect) a pond, esp one produced as a consequence of subsidence
13.
(modifier) involving, using, or produced by a flash of heat, light, etc: flash blindness, flash distillation
14.
flash in the pan, a project, person, etc, that enjoys only short-lived success, notoriety, etc
adjective
15.
(informal) ostentatious or vulgar
16.
(informal) of or relating to gamblers and followers of boxing and racing
17.
sham or counterfeit
18.
(informal) relating to or characteristic of the criminal underworld
19.
brief and rapid: flash freezing
verb
20.
to burst or cause to burst suddenly or intermittently into flame
21.
to emit or reflect or cause to emit or reflect light suddenly or intermittently
22.
(intransitive) to move very fast: he flashed by on his bicycle
23.
(intransitive) to come rapidly (into the mind or vision)
24.
(intransitive; foll by out or up) to appear like a sudden light: his anger really flashes out at times
25.

26.
(transitive) (informal) to display ostentatiously: to flash money around
27.
(transitive) (informal) to show suddenly and briefly
28.
(intransitive) (Brit, slang) to expose oneself indecently
29.
(transitive) to cover (a roof) with flashing
30.
to send a sudden rush of water down (a river, etc), or to carry (a vessel) down by this method
31.
(in the making of glass) to coat (glass) with a thin layer of glass of a different colour
32.
(transitive) to subject to a brief pulse of heat or radiation
33.
(transitive) to change (a liquid) to a gas by causing it to hit a hot surface
34.
(obsolete) to splash or dash (water)
adj.

1570s, of light; present participle adjective from flash (v.).
n.

“indecent exposure,” 1896, verbal noun from flash (v.). The meaning “strip of metal used in roofing, etc.” is from 1782, earlier simply flash (1570s), but it is of unknown origin and might be an unrelated word.
v.

late 14c., from flasken (c.1300) “to dash or splash” (as water), probably imitative. Related: Flashed; flashing. Sense of “give off a sudden burst of light or flame” is 1540s. Flash flood is from 1940. Flash card is from 1923. Flash cube (remember those?) is from 1965.
n.

1560s, from flash (v.); originally of lightning. Meaning “first news report” is from 1857. Meaning “photographic lamp” is from 1913. The comic book character dates to 1940. Flash in the pan (1809) is from old-style guns, where the powder might ignite in the pan but fail to spark the main charge.

adjective

noun

verb

In addition to the idiom beginning with
flash